Strain calculator

If you want to determine the change in an object's length when a deforming force is applied to it, you can use our strain calculator.

In physics, the deforming force acting on a body that may change its shape is known as strain. It is defined as the ratio of the change in the material's length to the initial length. In other words, it is a dimensionless ratio that is applied to determine the deformation in a solid material.


Formula of Strain Calculator

To instantly determine the strain in an object, jump to our free and online calculator, or to determine it manually, you can use the formula listed below:

\[ \in = \frac{{\Delta L}}{L}\]


\( \in \)= strain applied on an object

ΔL = Change in length

L = Initial Length


For a more precise and clear understanding of the concept, let us solve an example below:

Suppose a 3 m iron rod length is melted and after it stretches by 5 x 10-3 m. Find out the total strain in the iron road.

Given data

Initial length = 3m
Change in length = ΔL = 5 x 10-3 m

To Find

Total strain = ?


To find out the strain of iron, we will use the formula listed below:

\[ \in = \frac{{\Delta L}}{L}\]

Putting values in the formula:

\[ \in = \frac{{5×\;{{10}^{ - 3}}}}{3} = 1.67×{10^{ - 3}}\]


If you want to calculate stress, you can use our Stress Calculator.

How to use the Strain Calculator?

The steps to use the strain calculator are as follows:

Step 1: Enter the value of an initial length in the first required input.

Step 2: Enter the value of the change in length in the second required input.

Step 3: The calculator will automatically display an answer on the screen.

Calculator use

You can use our strain calculator in various real-life principles, such as; finding the object's length after deformation force is applied.